Front-wheel-brake joint



Feb. 4, 1930. R. BERINGER FRONT WHEEL BRAKE JOINT Filed Sept. ll, 1926 2 Sheets-Sheet l S14/ventola:

Feb.` 4, 1930. R BERINGER 3,746,22

FRONT WHEEL BRAKE JOINT Filed Sept. l1, 1926 2 Sheets-Sheet 2 UNI-TED s-TA ZBISCOE ERINGECBI, OF DETROIT, MICHIGAN, ASSIGNOR T O GENERAL MOTORS CDIREO-y Vure 1.

Patented Feb. 4, r193.0/

TES

RATIOIN2 0FA DETROIT, MICHIGAN,

A CORPORATION OF DELWARE rnoNnwnEEL-BBAKE Jouir Application led September 11,

This invention relates to brakes and is particularly concerned with 'front wheel brakes for vehicles. y'

An object of the invention is to provide an improved operating means for a front Wheel brake involving an improvement in thel universal joint located substantially in alignj ment with the wheel spindle pivot. l

Other objects will be understood upon a` reading of the following description together with an examination of the-accompanying drawing. y In-the drawing:

Figure 1 is a vertical sectionshowingthe pivoted connection between the wheel spindle and the front axle. Figure'2 is a section on line 2-2 of Fig- Figure 3 is a plan view looking down upon the yokeend of the cam shaft, (the. sleeve associated therewith being removed). v

-Figure 4`is a perspective of the cam shaft.

Figure 5 is a detail ofthe operating shaft. Referring by reference characters to drawing, numeral 1 yrepresents the axle, the axle being a front axle of the vehicle. wheel spindle 3vis constructed a a part o a knuckle ,5 ivotally mounted by pivot with axle 1. pon the spindle 3 is rotatably mounted a wheel l9, suitable bearings 11 being shown. The steering' arm is, illustrated at 13 and a tie rod at 15.`

Bolted at 17 to the wheel is a brake drum 19. Carried by the knuckle is a closure plate or shield 21. Within the, drum is a brake band -23 having a lining 25, suitable means being provide as at 27 to limit the release movement of the brake band' under the inlience of its' spring, not shown. v v

For operating the brake there is as usual a cam 29 for expanding the ends of the band and causing `its frictionalengagement with the drum. As shown in the drawing, there` is a bearing sleeve 31' carried by the shield plate, and within this bearing sleeve is rotatably mounted a vshaft 33 which. carries the cam 29, suitable retainers .35, screws 37 and washers 39 completing the assembly, and

holding the shaft incorrect longitudinalpovclamped as at 67 to y7 2 clamped at the A and will now be described. f the cam shaft 33 is enlarged to form a iange 7 77. The face of d ly for the entry of pin ceive a'pin 9.3

shaft 55, and when so 1926, Vserial No. 134,934.

sition relative to the sleeve for applying the brake to the drum. v

For actuation of the brake there is riveted to. a vehicleframe 41 a bracket v43 to which is secured a socket 45. Within the socket is a ball 47 on theend of the rod-49. A disc 51, witha surface to conform ball 47, is pressed against the ball by a spring 53 to secure a close fit between the ball and the socket andto prevent noise. Telescopically mounted'on rod 49 is a hollow shaft 55, a'bushing 57 located between the and the rod. Upon shaft 55 is secured by a split clamp 59 a lever arm61 having at its end means 63 for connecti n withv the Abrake operating linkage. 'A boot of leather 65 is the socket45 and at 69 to the hub 71 of the lever 61. Substantially over the pivot bolt v7 is arranged a universal shaft 55 'and the yoke end of joint` between This joint is housed by a boot cam shaft 33.

at 75 tothe bearing sleeve 31. v

The details of the joint above referred to constitute an important part of the invention The yoke end of this end is machined, cutout two diametrically opposite segments as at 81 and also machined -to cut out a central portion-83, thus leaving two yoke arms 85. Each of these arms is reception of a pin 87 and a bushing 89. \The diameter is such as to reach the edge of the arms which are lthen cut away at 91'suicient- 87 but not enough to admit the bushing 8 9. The adjacent end of the tubular shaft 55 \is forked as at 92 to reextended -at right angles to the trunnion pinv 87. Between the end of shaft 55 and the yoke on theuend of the cam shaft 33 is a spider member 95 which carries the diametrically opposite trunnion pins 87 ting The spindle is extended laterally from pins between the forked ends of iptositioned it is piv- 55 by the pin 87 and engages otally connectedl to sha shaft end, and the to that of the shaft 73 to the hollow shaft 55 and bored out for the- In assemblin the spider 95, its trunnion pms l87 are move through Vyoke membersof the cam the open ends ofthe Y `be understood that said yoke, and a sleeve Y ing anl ployed in order that bushings are thereafter assembled from the outside by moving them longitudinally on trunnion pins 87. This arrangement effects a pivotal connection between the cam shaft and the spider and the bushings serve to prevent a separation of the parts of the joint.v

It will be observed that these bushings are somewhat enlarged at one endas at 97, and the enlargement is flatted to engage the wall of the yoke and thereby the bushing isv held from rotation. After assembly'the shaft is moved into position within the sleeve 31 and there secured by the retaining means 35, 37 and 39. 4"When so secured in position the cam is inoperative relation to the brake band and also the enlarged end of the bearing sleeve 31, encircles the end of the bushings 89 and.

retains them in position on the t-runnion pins 87. y

By the arrangement above described a sims plified universal joint, and one easily assembled, is provided between the brake cam shaft and the brake operating shaft. It will this universal joint is positioned in functional relation with the shaft of the steering knuckle and that the tele scopic parts of the operating shaft, together. with the ball joint and the pivot 93, are emthe relative movements of the steeringaxle and chassis frame may occur without disturbing the brake operating assembly. v l

I claim:

1. In a transmission' device, a driving member, a driven member, nion coupling between said members, a bushing on said trunnion to lock said trunnion to surrounding said coupling to retain said bushing, the sleeve serving as a bearing for one of said members, and means to retain said member from longitudinal movement relative to said sleeve.

2. In a transmission device, a sleeve havenlarged end, a shaft journalled in said sleeve, means to retain said shaft from longitudinal movement relative to said sleeve, a second shaft, a coupling between said shafts v vc'zomprising a yoke and trunnion device with- 1n said 50 enlarged end of the sleeve, a bushing surrounding the-.trunnion within said yoke, said ,s leeve retaining said bushing on sald -trunn1on when said shaft is 'secureddby its retaining means.

3. In a brake, an operating shaft, a rock shaft for actuating said operating shaft,

coupling means for said shafts including a yoke on the end of one shaft, trunnion pins part connected to the other shaft, bushings for said trunnions, the bush.. ings holding said trunnions assembled in said yoke, and a sleeve surrounding said coupling lto retain said bushing in position together with a shield, said sleeve being mounted in said shield to'journal said operating shaft.

a. In a brake, a shield, a bearing sleeve `whereby the sleeveretains the bushing from radial movement olf said trunnions.

5. In a brake, a shield, a sleeve mounted therein, an operating shaft j ournalled in said sleeve, a rock shaft, a joint between said shafts including a radially movable bushing to lock the parts of said joint, lmeans to retain said operating shaft in operative vposition relative to said sleeve whereby the sleeve both journals said shaft and retains the bushing in position, and thereby prevents the separation of the parts of the joint.

In testimony whereof I aiiix my signature.

ROSCOE BERIN GER.

a yoke and trun- 

